Root gravity response module guides differential growth determining both root bending and apical hook formation

Zhu, Qiang; Gallemí, Marçal; Pospíšil, Jiří; Žádníková, Petra; Strnad, Miroslav; Benková, Eva

doi:10.1242/dev.175919

Cited by 25 publications

(50 citation statements)

References 64 publications

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“…The cell wall status affects apical hook bending by transcriptional regulation of PINs and AUX1 through ARF2 (Aryal et al, 2020;Sampathkumar and Eng, 2020). Recently, it was shown that auxin gradient formed at the root tip by PIN2 is required for root growth in response to gravity (Zhu and Gallem, 2019). The root auxin gradient gradually extends toward hypocotyl and might trigger the hypocotyl bending resulting in hook formation.…”

Section: Hormonal Regulation Of Plant Development In Dark Apical Hookmentioning

confidence: 99%

Dark-Induced Hormonal Regulation of Plant Growth and Development

et al. 2020

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The sessile nature of plants has made them extremely sensitive and flexible toward the constant flux of the surrounding environment, particularly light and dark. The light is perceived as a signal by specific receptors which further transduce the information through the signaling intermediates and effector proteins to modulate gene expression. Signal transduction induces changes in hormone levels that alters developmental, physiological and morphological processes. Importance of light for plants growth is well recognized, but a holistic understanding of key molecular and physiological changes governing plants development under dark is awaited. Here, we describe how darkness acts as a signal causing alteration in hormone levels and subsequent modulation of the gene regulatory network throughout plant life. The emphasis of this review is on dark mediated changes in plant hormones, regulation of signaling complex COP/DET/FUS and the transcription factors PIFs which affects developmental events such as apical hook development, elongated hypocotyls, photoperiodic flowering, shortened roots, and plastid development. Furthermore, the role of darkness in shade avoidance and senescence is discussed.

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Section: Hormonal Regulation Of Plant Development In Dark Apical Hookmentioning

confidence: 99%

Dark-Induced Hormonal Regulation of Plant Growth and Development

et al. 2020

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“…To test this hypothesis we quantified the growth increase over 6 hour period in radicle and hypocotyl of young seedling using confocal imaging (Fig. 5C) 82 . Indeed, root radicle grew significantly faster that adjacent hypocotyl( Fig.…”

Section: Anisotropic Growth Results From Differential Expansion At Thmentioning

confidence: 99%

“…Under these conditions the anisotropic growth of the root is self-organizing, later setting the polarity axis. (C) Screenshots from time-lapse imaging of growing radicle with PIP-GFP plasma membrane marker82 for a total time of 6 hours. (D) Percentage of growth increase per hour for adjacent organs radicle (root) and hypocotyl quantified from the time-lapse confocal imaging of three independent plants (n=3) .…”

mentioning

confidence: 99%

A coupled mechano-biochemical framework for root meristem morphogenesis

Marconi

Gallemí

Benková

et al. 2021

Preprint

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Understanding how an independent organ develops from the stem cell populations in the process called morphogenesis is a pressing challenge in developmental biology and medicine. Plants build up new organs such as roots to adjust their bodies to dynamic changes in the environment, thereby providing a tractable model to address this challenge. Here, we combined empirical data with advanced computer modeling techniques to build a mechanistic cell-based framework for the morphogenesis of the plant root. Our framework relies on experimentally supported design principles underlying the multi-layered feedback between tissue mechanics, cell growth, and directional cell-to-cell transport of growth regulator auxin. Model simulations reconstruct experimentally-observed patterns of anisotropic growth, auxin distribution, and cell polarity, as well as several root phenotypes caused by chemical, mechanical, or genetic perturbations. Furthermore, our model provides new insights into mechanisms of sustained root growth and cell polarity establishment. This work reveals that mobile auxin signal feeds back on cell polarity and growth mechanics to instruct the morphogenesis of an independent organ.

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“…Although formation of the apical hook and its light‐regulated opening is known to be tightly regulated by several hormones (Wang & Guo, 2019), how ABA influences this process at the molecular level remains less understood. Indeed, the balance between ABA and gibberellic acid plays an important role in apical hook formation (Zhu et al ., 2019). HOOKLESS1 (HLS1), a central regulator of apical hook development, is induced by ABA and promotes ABA responses by directly activating ABI5 transcription, and indicates its position as an integration point for ABA signalling and hook development (Liao et al ., 2016).…”

Section: Aba Puts a Brake On Light‐induced Greening Of Seedlingsmentioning

confidence: 99%

Light and abscisic acid interplay in early seedling development

Yadukrishnan

Datta

2020

New Phytologist

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Abscisic acid (ABA) plays a crucial role in plant development, regulating germination, seedling development and stomatal movements, especially under adverse conditions. Light interacts with the ABA signalling pathway to fine tune these processes. Here, we provide an overview of the recent investigations on ABA-light interplay during early plant development after germination. We discuss the multilayered and reciprocal interactions between ABA signalling components and several light signalling modulators, including photoreceptors, transcription factors and posttranslational modifiers. ABSCISIC ACID INSENSITIVE5 acts as a central convergence point for these interactions during postgermination seedling development. ABA also regulates the adaptation of seedlings to challenging light environments. Furthermore, we enlist the role of ABA-light cross-talk in regulating seedling establishment in crops and highlight open questions for future investigations.

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Root gravity response module guides differential growth determining both root bending and apical hook formation

Cited by 25 publications

References 64 publications

Dark-Induced Hormonal Regulation of Plant Growth and Development

Dark-Induced Hormonal Regulation of Plant Growth and Development

A coupled mechano-biochemical framework for root meristem morphogenesis

Light and abscisic acid interplay in early seedling development

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